Locking valve

Abstract

The utility model discloses a holding valve, which relates to the related technical field of valves, and comprises a valve body provided with an air inlet, an air outlet, an air passage, a first accommodating cavity and a second accommodating cavity; the air channel starts from the air inlet, sequentially passes through the first containing cavity and the second containing cavity and finally communicates with the air outlet. The valve element assembly comprises a valve element body, a connecting piece, a sealing piece and a first cover body. The valve element assembly is arranged in the first containing cavity. The sealing piece comprises an annular groove, a framework body and a turbulent flow part, and a lubricating coating is arranged on the surface of the sealing piece. The valve core assembly comprises a transition body, a valve core and a second cover body, and the valve core assembly is arranged in the second containing cavity. After the holding valve is communicated with an air source and the tire, the valve element body is rotated, so that the air channel is controlled to be opened and closed, and tire inflation is achieved. The turbulent flow part in the sealing piece can guide the airflow and disperse the energy of the airflow impact structure. The matching of the ring groove and the framework body in the sealing element can reduce the contact area, improve the pressure stress distribution of the sealing element, and further reduce the abrasion.

Description

Technical Field

[0001] This utility model relates to the field of valve-related technology, and in particular to a locking valve. Background Technology

[0002] Lock-up valves are typically installed on wheels and connected to the tire inflation / deflation system. After operation, they can inflate, deflate, test, and maintain tire pressure. In other words, a lock-up valve is a functional valve that improves the reliability of the central tire inflation / deflation system. When other parts of the air circuit malfunction, the lock-up valve effectively disconnects the tire from the air circuit, and the tire pressure can be adjusted externally.

[0003] Both utility model patents with authorization announcement numbers CN202195131U and CN206280506U disclose related locking valves. From the structure of the locking valve, it can be seen that when the locking valve is in pressure-holding mode, it uses an adjustable valve core to block the air passage connecting the inlet and outlet, thereby disconnecting the passage between the inlet and outlet. In the prior art, to ensure that the valve core reliably blocks the aforementioned air passage, a sealing element is usually provided at the lower end of the valve core to improve sealing performance.

[0004] Both of the aforementioned disclosed patents include sealing elements. While these sealing elements can improve sealing to some extent, their drawbacks cannot be ignored. For example:

[0005] 1. When adjusting the valve core, the sealing element is usually driven to block the air passage by screwing it in and out. The screwing force when tightening is basically based on experience. This may cause the sealing element to be subjected to excessive extrusion force, which will cause fatigue of its internal structure and ultimately affect the sealing performance.

[0006] 2. The high-pressure gas during inflation directly impacts the seal, which may cause elastic deformation of the seal or cause micro-cutting or erosion on the surface of the seal, resulting in surface roughening and thus reducing the original sealing performance of the seal. Utility Model Content

[0007] To address the above issues and overcome the shortcomings of existing technologies, this invention provides anti-cavitation functionality for users by reducing cavitation phenomena. A turbulence-dispersing section is provided at the bottom of the seal to disperse airflow energy and reduce the impact of gas on the seal. Simultaneously, the seal surface is coated with a lubricating material such as polyurethane or polytetrafluoroethylene, which significantly reduces frictional resistance between components, thereby preventing seal wear and enhancing the device's sealing performance.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] This utility model provides a locking valve, comprising:

[0010] The valve body has an air inlet, an air outlet, and an air passage connecting the air inlet and the air outlet;

[0011] A first receiving cavity is used to accommodate a valve core assembly, the lower end of which is provided with a seal.

[0012] The second receiving cavity is used to house the valve core assembly;

[0013] The lower part of the seal has a concave turbulence portion at the position directly opposite the air passage. The upper edge of the turbulence portion is composed of a first arc segment with a first curvature and a second arc segment with a second curvature. The first curvature is 2-2.5 times the second curvature.

[0014] The top of the spoiler is coated with a polyurethane coating or a polytetrafluoroethylene coating on the entire curved surface covering the first and second arc segments.

[0015] In some embodiments of this utility model, a polyurethane coating is applied to the entire curved surface covering the first and second arc segments, and the thickness of the polyurethane coating is 100-150 μm.

[0016] In some embodiments of this utility model, the entire curved surface covering the first and second arc segments is coated with a polytetrafluoroethylene (PTFE) coating, the thickness of which is 20-25 μm.

[0017] In some embodiments of this utility model, the lower part of the seal is provided with at least two spaced annular grooves, which extend from the lower surface of the seal into the interior of the seal.

[0018] In some embodiments of this utility model, a mesh-like skeleton is embedded in the annular groove, and the lower surface of the skeleton is 0.2mm-0.5mm away from the lower surface of the seal.

[0019] In some embodiments of this utility model, a corrosion-inhibiting part is provided on the annular groove closest to the turbulence part. The outer edge of the corrosion-inhibiting part is a third arc segment with a third curvature, which is 1.3-1.5 times the second curvature.

[0020] In some embodiments of this utility model, the lower surface of the seal, excluding the turbulence portion, is also coated with a polyurethane coating or a polytetrafluoroethylene coating.

[0021] In some embodiments of this utility model, the valve core assembly includes:

[0022] The transition body is screwed into the second receiving cavity;

[0023] The valve core is placed in the transition body;

[0024] The second cover is connected to the upper end of the transition body via threads.

[0025] In some embodiments of this utility model, the valve core assembly includes at least:

[0026] A valve core that can move up and down and a connecting piece;

[0027] The seal is indirectly connected to the lower end of the valve core via a connector.

[0028] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0029] (1) The locking valve of this application includes a valve body, which has an air inlet, an air outlet, an air passage, a first receiving cavity, and a second receiving cavity. The valve core assembly is disposed in the first receiving cavity; the valve core assembly is disposed in the second receiving cavity. The valve core assembly and the valve core assembly are arranged side by side on the same side of the valve body, which is compact in structure, saves space for the arrangement of automotive tire locking valves, and is easy to operate.

[0030] (2) In the locking valve of this application, the lower part of the sealing element, which directly seals the air passage, has a concave turbulence portion located directly opposite the air passage. The upper edge of the turbulence portion is composed of a first arc segment with a first curvature and a second arc segment with a second curvature; wherein the first curvature is 2-2.5 times the second curvature. In addition, a corrosion inhibitor is provided on the annular groove closest to the turbulence portion. The outer edge of the corrosion inhibitor is a third arc segment with a third curvature, which is 1.3-1.5 times the second curvature. In this way, the high-pressure gas during inflation directly impacts the turbulence portion, which diverts and guides the high-pressure gas, dissipating the energy of the high-pressure gas and preventing the high-pressure gas from cutting or eroding the surface of the sealing element.

[0031] (3) In the locking valve of this application, at least two spaced annular grooves are provided at the lower part of the seal, and the lower surface of the seal is coated with a polyurethane coating or a polytetrafluoroethylene coating. When rotating the valve core assembly, on the one hand, the annular grooves can reduce the contact area between the seal and the valve body; on the other hand, the polyurethane coating or polytetrafluoroethylene coating can significantly reduce the friction between the seal and the valve body, further preventing wear of the seal.

[0032] (4) In the locking valve of this application, at least two spaced annular grooves are provided at the lower part of the sealing element, and a mesh-like skeleton is embedded in the annular grooves. In this way, when the valve core assembly is tightened, the skeleton can assist the sealing element in bearing pressure, avoid excessive compressive stress on the sealing element, and reduce structural fatigue.

[0033] (5) The locking valve of this application includes a valve body, a valve core assembly, and a valve core assembly. After the air outlet is connected to the tire, there are two inflation methods:

[0034] Connect the air inlet to the air source, open the valve core assembly, and inflation can begin;

[0035] Once the valve core of the valve core assembly is connected to the air source, inflation can begin.

[0036] (6) In the locking valve of this application, the first and second receiving cavities of the valve body are designed as convex structures, and the valve core assembly and valve core assembly are sunk into the valve body, which can effectively prevent the parts from being hit by stones during the driving of the car. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the lockout valve structure;

[0039] Figure 2 This is a schematic diagram of the valve body structure;

[0040] Figure 3 This is a schematic diagram of the valve core assembly;

[0041] Figure 4 This is a schematic diagram showing the disassembled valve core assembly;

[0042] Figure 5 This is a schematic diagram of the sealing component structure;

[0043] Figure 6 This is a schematic diagram of the valve core assembly.

[0044] Figure label:

[0045] 1-Valve body; 101-Air inlet; 102-Air outlet; 103-Air passage; 104-First receiving cavity; 105-Second receiving cavity; 106-First step; 107-Second step;

[0046] 2-Valve core assembly; 201-Wrench groove; 202-Sealing ring; 203-First tenon; 204-Ball head;

[0047] 3-Connector; 301-Ball seat;

[0048] 4-Seal; 401-Annular groove; 402-Turbulence section; 4021-First arc segment; 4022-Second arc segment; 403-Corrosion inhibitor;

[0049] 5-First cover;

[0050] 6-Valve core assembly;

[0051] 7-Transition body;

[0052] 8-Valve core;

[0053] 9-Second cover;

[0054] 10 - Sealing ring. Detailed Implementation

[0055] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0056] In the description of the embodiments of this utility model, it should be understood that the terms "lateral", "up", "down", "left", "right", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0059] The embodiments of this utility model will be described in detail below.

[0060] This utility model provides a locking valve:

[0061] like Figures 1-2As shown, the locking valve is a lift valve, comprising: a valve body 1, with an air inlet 101, an air outlet 102, an air passage 103, a first receiving cavity 104, and a second receiving cavity 105. The air passage 103, after passing through the first receiving cavity 104 and the second receiving cavity 105, connects at one end to the air inlet 101 and at the other end to the air outlet 102. When machining the valve body 1, the air inlet 101, the air outlet 102, the first receiving cavity 104, and the second receiving cavity 105 can be drilled first, and then the air passage 103 can be machined. The structural design of the valve body 1 facilitates its machining.

[0062] Specifically, the first receiving cavity 104 is located between the air inlet 101 and the second receiving cavity 105, and has a first step 106 in the middle; the second receiving cavity 105 is located between the first receiving cavity 104 and the air outlet 102, and has a second step 107 in the middle. The first step 106 and the second step 107 limit the valve core assembly 2 and the valve core assembly 6 respectively during installation, simplifying the installation difficulty and improving the installation accuracy.

[0063] Specifically, such as Figures 3-4 As shown, valve core assembly 2 includes valve core body 20, connector 3, seal 4, and first cover 5, and is disposed within first receiving cavity 104; valve core assembly 6 includes transition body 7, valve core 8, and second cover 9, and is disposed within second receiving cavity 105. Valve core assembly 2 and valve core assembly 6 are arranged side-by-side on the same side of valve body 1, resulting in a compact structure that saves space for the automotive tire lock-up valve and facilitates operation.

[0064] Specifically, the valve core assembly 2 is disposed within the first receiving cavity 104, including:

[0065] The first cover 5 is positioned above the first receiving cavity 104 to prevent dust and debris from contaminating the valve core assembly 2 components.

[0066] The valve core 20 includes a wrench groove 201, a sealing ring 202, a first tenon 203, and a ball head 204. The valve core 20 is threadedly connected to the first receiving cavity 104. The wrench groove 201 adopts a countersunk hole design, which can effectively save the space of the parts and increase the structural reliability. By using a wrench and rotating the valve core 20 through the wrench groove 201, the valve core 20 can be moved up and down.

[0067] The connector 3 includes a ball seat 301, which encloses a ball head 204. When the valve core 20 moves up and down, the ball head 204 drives the connector 3, thereby causing the connector 3 to move up and down synchronously.

[0068] like Figure 5As shown, seal 4 is located below connector 3 and contacts valve body 1. Connector 3 moves downward to compress seal 4, thereby sealing air passage 103.

[0069] Specifically, the seal 4 includes:

[0070] The annular groove 401 maintains line contact with the valve body 1, reducing the contact area compared to the surface contact in the prior art. This reduces friction during use and wear on the seal 4, improving the overall structural reliability and extending the product's service life.

[0071] A mesh-like skeleton body 4010 is embedded in the annular groove 401. In this way, when the valve core assembly 2 is tightened, the skeleton body 4010 can assist the seal 4 in bearing pressure, avoid excessive compressive stress on the seal 4, and reduce structural fatigue.

[0072] The flow-dispersing section 402 includes a first arc segment 4021 and a second arc segment 4022. In this way, the high-pressure gas during inflation directly impacts the flow-dispersing section 402, which diverts and guides the high-pressure gas, dissipating its energy and preventing the high-pressure gas from cutting or eroding the surface of the seal.

[0073] A corrosion inhibitor 403 is provided on the annular groove 401 closest to the turbulence section 402. The outer edge of the corrosion inhibitor 403 is a third arc segment with a third curvature, which is 1.3-1.5 times the second curvature.

[0074] Furthermore, the curvature of the first arc segment 4021 is 2-2.5 times that of the second arc segment 4022, and the two sides are tangent. The first arc segment 4021 diverts the incoming airflow and guides the gas flow direction, while the second arc segment 4022, while diverting the airflow, also seals the air passage 103 to prevent reverse gas flow.

[0075] The lower surface of seal 4 is coated with a polyurethane coating or a polytetrafluoroethylene coating.

[0076] Specifically, such as Figure 6 As shown, the valve core assembly 6 includes:

[0077] When installing the transition body 7, it is limited to simplify the operation process and improve the installation accuracy.

[0078] The valve core 8 is placed inside the transition body 7. The valve core 8 can be used for inflation or deflation.

[0079] The second cover 9 is connected to the transition body 7 by threads, which can prevent dust and debris from contaminating the valve core assembly 6 parts;

[0080] When assembling the locking valve in this embodiment, the following method is preferred:

[0081] Step 1: Position the side of the seal 4 with the annular groove 401 toward the air passage 103 and place the seal 4 into the first receiving cavity 104;

[0082] Step 2: Wrap the ball seat 301 of the connector 3 around the ball head 204, and then use a wrench to rotate the valve core 20. In this way, the valve core 20 pushes the connector 3 into the first receiving cavity 104 until the connector 3 touches the seal 4.

[0083] Step 3: Weld the valve core 8 to the transition body 7, then place the transition body 7 into the second receiving cavity 105, and then weld the transition body 7 to the valve body 1.

[0084] When using the locking valve in this embodiment to inflate a tire, the following usage method is preferred:

[0085] Method 1: Connect the air inlet 101 to the air source and the air outlet 102 to the tire. Use a wrench to rotate the valve core 20. At this time, the ball head 204 of the valve core 20 drives the connecting piece 3 to rise synchronously. Under the action of air pressure, the seal 4 is blown up and rises. Under the diversion and guidance of the turbulence section 402, the airflow is finally injected into the tire from the air outlet 102. After inflation is completed, use a wrench to rotate the valve core 20. At this time, the ball head 204 of the valve core 20 drives the connecting piece 3 to fall synchronously. The connecting piece 3 pushes the seal 4, and the seal 4 seals the air passage 103. The air inlet 101 disconnects the air source, and the air outlet 102 disconnects the tire, completing the inflation.

[0086] Method 2: Valve core 8 is connected to the air source, and air outlet 102 is connected to the tire. Under air pressure, gas flows in from valve core 8 and finally enters the tire from air outlet 102, completing the inflation.

[0087] When using the locking valve in this embodiment to deflate a tire, the following usage method is preferred:

[0088] The air outlet 102 is connected to the tire. When the valve core 8 is opened, gas flows from the tire into the air outlet 102 and is finally released from the valve core 8.

[0089] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A locking valve, comprising: The valve body (1) has an air inlet (101), an air outlet (102) and an air passage (103) connecting the air inlet (101) and the air outlet (102). A first receiving cavity (104) is used to receive a valve core assembly (2), the lower end of which is provided with a seal (4). The second receiving cavity (105) is used to receive the valve core assembly (6); Its features are: The lower part of the seal (4) has a recessed turbulence portion (402) at the position directly opposite the air passage (103). The upper edge of the turbulence portion (402) is composed of a first arc segment (4021) with a first curvature and a second arc segment (4022) with a second curvature; the first curvature is 2-2.5 times the second curvature. The top of the turbulence section (402) is coated with a polyurethane coating or a polytetrafluoroethylene coating on the entire curved surface covering the first arc segment (4021) and the second arc segment (4022).

2. The shut-off valve according to claim 1, characterized in that The thickness of the polyurethane coating is 100-150 μm.

3. The shut-off valve according to claim 1, characterized in that The thickness of the polytetrafluoroethylene coating is 20-25 μm.

4. The shut-off valve of claim 1, wherein The lower part of the seal (4) is provided with at least two spaced annular grooves (401), which extend from the lower surface of the seal (4) into the interior of the seal (4).

5. The shut-off valve according to claim 4, characterized in that A mesh-like skeleton (4010) is embedded in the annular groove (401), and the lower surface of the skeleton (4010) is 0.2mm-0.5mm away from the lower surface of the seal (4).

6. The shut-off valve according to claim 4, characterized in that A corrosion inhibitor (403) is provided on the annular groove (401) closest to the turbulence section (402). The outer edge of the corrosion inhibitor (403) is a third arc segment with a third curvature, which is 1.3-1.5 times the second curvature.

7. The shut-off valve of claim 1, wherein The lower surface of the seal (4), except for the turbulence part (402), is also coated with a polyurethane coating or a polytetrafluoroethylene coating.

8. The shut-off valve of claim 1, wherein The valve core assembly (6) includes: The transition body (7) is screwed into the second receiving cavity (105); Valve core (8) is placed in the transition body (7); The second cover (9) is connected to the upper end of the transition body (7) by threads.

9. The shut-off valve of claim 1, wherein The valve core assembly (2) includes at least: A valve core (20) that can move up and down; and One connector (3); The sealing element (4) is indirectly connected to the lower end of the valve core (20) via the connector (3).

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